package top.likeqc.blog.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * @author likeqc.top
 * @date 2021/4/16 15:43
 */
public class MD5Utlils {

    /**
     * MD5加密类
     * @param str 要加密的字符串
     * @return    加密后的字符串
     */
    public static String code(String str) {
        try{
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(str.getBytes());
            byte[] bytes = md.digest();
            int i;
            StringBuilder buf = new StringBuilder("");
            for (int offset = 0; offset < bytes.length; offset++) {
                i = bytes[offset];
                if (i < 0) {
                    i += 25;
                }
                if (i < 16) {
                    buf.append("0");
                }
                buf.append(Integer.toHexString(i));
            }
            // 32位加密
            return buf.toString();
            // 16位加密
            // return buf.toString().substring(8, 24);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args) {
        System.out.println(code("1"));
    }
}
